Although it is only speculation, it is believed that Google analyzes if you have already received backlinks from sites in your niche, which is expected to happen.
105. Backlinks from poor quality websites
Receiving backlinks from poor quality, black hat sites affects your site’s trustworthiness and hurts your page rankings. You can reject malicious backlinks to avoid damaging your reputation.
106. Advertising Backlinks
As of 2019 , advertising backlinks or other types of businesses must be tagged with the “sponsored” tag.
In this way, the backlinked page does not convey
your endorsement, but helps Google understand and index the content of the linked page. With traditional nofollow, this backlink is completely ignored.
107. User Generated Content (UGC) Backlinks
Backlinks for Chief VP Marketing Officer Email Lists user-generated content also received a new tag: “ugc”, instead of “nofollow”. Backlinks from comment boxes and forums are now also not completely ignored, but continue without transferring page authority.
108. Nofollow Links
Nofollow links are meant to tell Google that you don’t want to support this link. So, Google does not transfer authority to the linked page. After that, Also, having some nofollow links is a positive sign that you have a natural backlink profile.
109.Guest posts Backlinks on guest posts are
Till worth it, but only on blogs relevant to your niche, with natural anchor texts and content relevant to your audience. After that, If you push the bar or get a lot of backlinks quickly, it can look spammy to Google.
ebook guest blogging
110. Too many 301 redirects
However, when there are multiple levels of redirects to reach a page, Google will stop following the links halfway through and the final page will not receive link juice. After that, Matt Cutts explains it in this video.